Opposite of aweather, to a sailor (4)
I believe the answer is:
alee
'opposite of aweather to a sailor' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for alee that I've seen before include "On ship's sheltered side" , "On the sheltered side (of a ship)" , "Nautical term" .)